1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e24dfd13529aa78eb80549b2c3a4d6f3ccd40d0f98eab500ee98e7524aa28b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a827b34-d93b-40d1-a3ac-d7901d907b9c.json and https://artists.proofprofile.net/proofs/artist/7a827b34-d93b-40d1-a3ac-d7901d907b9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5005a43ca60cf23da3382a4ee4c20f20fdad013e83eb4a3fe6a866d079bb28. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:05:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING211003334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1774f5478514188ae27b41d1e697d587c9c02778c7e41278b9e179f35d108ea. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:06:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING211001808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd574941439f408c253ed9e6181304c6c6db32ffb5f34f1bb7f27fb9e38d01a98. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING211003333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa57036a0df6a75fb75c9a0a7a3f8d105e3b94da81851bac5df7a0fa0215c4e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING211003335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cabc071ad8d833ee366a4466ed1f99bb74a5965f28b0787cd471de0c51490ec. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ING211005726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9402c82ddc1e8241219be21f09ec57b1b47ddb88f5100e6e1529980dfac23d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DGA0S2467282.